lvm - Read For Learn

How to find the physical volume(s) that hold a logical volume in LVM

The pvdisplay command has a -m option to show the mapping of physical extents to logical volumes and logical extents. I have set up the following situation on a test machine: 3 disks of 1GB each added to the system and used as physical volumes for vg_test 6 logical volumes made with various sizes (ranging … Read more

LVM dangers and caveats

Summary Risks of using LVM: Vulnerable to write caching issues with SSD or VM hypervisor Harder to recover data due to more complex on-disk structures Harder to resize filesystems correctly Snapshots are hard to use, slow and buggy Requires some skill to configure correctly given these issues The first two LVM issues combine: if write … Read more